Page Menu
Home
c4science
Search
Configure Global Search
Log In
Files
F85058807
mx_func.c
No One
Temporary
Actions
Download File
Edit File
Delete File
View Transforms
Subscribe
Mute Notifications
Award Token
Subscribers
None
File Metadata
Details
File Info
Storage
Attached
Created
Thu, Sep 26, 12:18
Size
1 KB
Mime Type
text/x-c
Expires
Sat, Sep 28, 12:18 (1 d, 23 h)
Engine
blob
Format
Raw Data
Handle
21123657
Attached To
R10977 RADIANCE Photon Map
mx_func.c
View Options
#ifndef lint
static
const
char
RCSid
[]
=
"$Id: mx_func.c,v 2.9 2014/07/08 18:25:00 greg Exp $"
;
#endif
/*
* mx_func.c - routine for mixture functions.
*/
#include "copyright.h"
#include "ray.h"
#include "func.h"
#include "rtotypes.h"
/*
* A mixture function is specified:
*
* modifier mixfunc name
* 4+ foremod backmod varname vfname xf
* 0
* n A1 A2 ..
*
* Vfname is the name of the file where the variable definition
* can be found. The list of real arguments can be accessed by
* definitions in the file. The xf is a transformation
* to get from the original coordinates to the current coordinates.
*/
int
mx_func
(
/* compute mixture function */
OBJREC
*
m
,
RAY
*
r
)
{
OBJECT
obj
;
int
i
;
double
coef
;
OBJECT
mod
[
2
];
MFUNC
*
mf
;
if
(
m
->
oargs
.
nsargs
<
4
)
objerror
(
m
,
USER
,
"bad # arguments"
);
obj
=
objndx
(
m
);
for
(
i
=
0
;
i
<
2
;
i
++
)
if
(
!
strcmp
(
m
->
oargs
.
sarg
[
i
],
VOIDID
))
mod
[
i
]
=
OVOID
;
else
if
((
mod
[
i
]
=
lastmod
(
obj
,
m
->
oargs
.
sarg
[
i
]))
==
OVOID
)
{
sprintf
(
errmsg
,
"undefined modifier
\"
%s
\"
"
,
m
->
oargs
.
sarg
[
i
]);
objerror
(
m
,
USER
,
errmsg
);
}
mf
=
getfunc
(
m
,
3
,
0x4
,
0
);
setfunc
(
m
,
r
);
errno
=
0
;
coef
=
evalue
(
mf
->
ep
[
0
]);
if
(
errno
==
EDOM
||
errno
==
ERANGE
)
{
objerror
(
m
,
WARNING
,
"compute error"
);
return
(
0
);
}
if
(
raymixture
(
r
,
mod
[
0
],
mod
[
1
],
coef
))
{
if
(
m
->
omod
!=
OVOID
)
objerror
(
m
,
USER
,
"inappropriate modifier"
);
return
(
1
);
}
return
(
0
);
}
Event Timeline
Log In to Comment